all: hello
hello: hello.c
- gcc -g -I../libmarkers -I../share -I../libtracing -L../libmarkers -lmarkers -L../libtracectl -ltracectl -L../libtracing -ltracing -o hello hello.c marker-control.c serialize.c
+#dynamic version
+# gcc -g -I../libmarkers -I../share -I../libtracing -L../libmarkers -lmarkers -L../libtracectl -ltracectl -L../libtracing -ltracing -o hello hello.c marker-control.c serialize.c -static
+#static version
+ gcc -g -I../libmarkers -I../share -I../libtracing -L../libmarkers -o hello hello.c marker-control.c serialize.c ../libtracing/*.c ../libmarkers/*.c ../libtracectl/*.c ../share/*.c
clean:
rm -rf hello *.o
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include "../libmarkers/marker.h"
#include "usterr.h"
#include "tracer.h"
#include "marker-control.h"
+#include "relay.h"
+
+
+char consumer_stack[10000];
+char trace_name[] = "theusttrace";
+char trace_type[] = "ustrelay";
+
+#define CPRINTF(fmt, args...) safe_printf(fmt "\n", ## args)
+
+int safe_printf(const char *fmt, ...)
+{
+ static char buf[500];
+ va_list ap;
+ int n;
+
+ va_start(ap, fmt);
+
+ n = vsnprintf(buf, sizeof(buf), fmt, ap);
+
+ write(STDOUT_FILENO, buf, n);
+
+ va_end(ap);
+}
+
+int consumer(void *arg)
+{
+ int result;
+
+ int fd;
+
+ char str[] = "Hello, this is the consumer.\n";
+
+ struct ltt_trace_struct *trace;
+
+ ltt_lock_traces();
+ trace = _ltt_trace_find(trace_name);
+ ltt_unlock_traces();
+
+ if(trace == NULL) {
+ CPRINTF("cannot find trace!");
+ return 1;
+ }
+
+ CPRINTF("consumer: got a trace: %s with %d channels\n", trace_name, trace->nr_channels);
+
+ struct ltt_channel_struct *chan = &trace->channels[0];
+
+ CPRINTF("channel 1 (%s) active=%u", chan->channel_name, chan->active & 1);
+
+ struct rchan *rchan = chan->trans_channel_data;
+ struct rchan_buf *rbuf = rchan->buf;
+ struct ltt_channel_buf_struct *lttbuf = chan->buf;
+ long consumed_old;
+
+ result = fd = open("trace.out", O_WRONLY | O_CREAT | O_TRUNC, 00644);
+ if(result == -1) {
+ perror("open");
+ return -1;
+ }
+
+ for(;;) {
+ write(STDOUT_FILENO, str, sizeof(str));
+
+ result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old);
+ if(result < 0) {
+ CPRINTF("ltt_do_get_subbuf: error: %s", strerror(-result));
+ }
+ else {
+ CPRINTF("success!");
+
+ result = write(fd, rbuf->buf_data + (consumed_old & (2 * 4096-1)), 4096);
+ ltt_do_put_subbuf(rbuf, lttbuf, consumed_old);
+ }
+
+ //CPRINTF("There seems to be %ld bytes available", SUBBUF_TRUNC(local_read(<tbuf->offset), rbuf->chan) - consumed_old);
+ CPRINTF("Commit count %ld", local_read(<tbuf->commit_count[0]));
+
+
+ sleep(1);
+ }
+}
+
+void start_consumer(void)
+{
+ int result;
+
+ result = clone(consumer, consumer_stack+sizeof(consumer_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM, NULL);
+ if(result == -1) {
+ perror("clone");
+ }
+}
void probe(const struct marker *mdata,
void *probe_private, void *call_private,
printf("In probe\n");
}
-//ust// void try_map()
-//ust// {
-//ust// char *m;
-//ust//
-//ust// /* maybe add MAP_LOCKED */
-//ust// m = mmap(NULL, 4096, PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE , -1, 0);
-//ust// if(m == (char*)-1) {
-//ust// perror("mmap");
-//ust// return;
-//ust// }
-//ust//
-//ust// printf("The mapping is at %p.\n", m);
-//ust// strcpy(m, "Hello, Mapping!");
-//ust// }
-
-//sig_atomic_t must_quit;
-
void inthandler(int sig)
{
printf("in handler\n");
return 0;
}
-//ust// DEFINE_MUTEX(probes_mutex);
-//ust//
-//ust// static LIST_HEAD(probes_registered_list);
-//ust//
-//ust// int ltt_marker_connect(const char *channel, const char *mname,
-//ust// const char *pname)
-//ust//
-//ust// {
-//ust// int ret;
-//ust// struct ltt_active_marker *pdata;
-//ust// struct ltt_available_probe *probe;
-//ust//
-//ust// ltt_lock_traces();
-//ust// mutex_lock(&probes_mutex);
-//ust// probe = get_probe_from_name(pname);
-//ust// if (!probe) {
-//ust// ret = -ENOENT;
-//ust// goto end;
-//ust// }
-//ust// pdata = marker_get_private_data(channel, mname, probe->probe_func, 0);
-//ust// if (pdata && !IS_ERR(pdata)) {
-//ust// ret = -EEXIST;
-//ust// goto end;
-//ust// }
-//ust// pdata = kmem_cache_zalloc(markers_loaded_cachep, GFP_KERNEL);
-//ust// if (!pdata) {
-//ust// ret = -ENOMEM;
-//ust// goto end;
-//ust// }
-//ust// pdata->probe = probe;
-//ust// /*
-//ust// * ID has priority over channel in case of conflict.
-//ust// */
-//ust// ret = marker_probe_register(channel, mname, NULL,
-//ust// probe->probe_func, pdata);
-//ust// if (ret)
-//ust// kmem_cache_free(markers_loaded_cachep, pdata);
-//ust// else
-//ust// list_add(&pdata->node, &markers_loaded_list);
-//ust// end:
-//ust// mutex_unlock(&probes_mutex);
-//ust// ltt_unlock_traces();
-//ust// return ret;
-//ust// }
-//ust//
-//ust//
-//ust// int ltt_probe_register(struct ltt_available_probe *pdata)
-//ust// {
-//ust// int ret = 0;
-//ust// int comparison;
-//ust// struct ltt_available_probe *iter;
-//ust//
-//ust// mutex_lock(&probes_mutex);
-//ust// list_for_each_entry_reverse(iter, &probes_registered_list, node) {
-//ust// comparison = strcmp(pdata->name, iter->name);
-//ust// if (!comparison) {
-//ust// ret = -EBUSY;
-//ust// goto end;
-//ust// } else if (comparison > 0) {
-//ust// /* We belong to the location right after iter. */
-//ust// list_add(&pdata->node, &iter->node);
-//ust// goto end;
-//ust// }
-//ust// }
-//ust// /* Should be added at the head of the list */
-//ust// list_add(&pdata->node, &probes_registered_list);
-//ust// end:
-//ust// mutex_unlock(&probes_mutex);
-//ust// return ret;
-//ust// }
-//ust//
-//ust//
-//ust// struct ltt_available_probe default_probe = {
-//ust// .name = "default",
-//ust// .format = NULL,
-//ust// .probe_func = ltt_vtrace,
-//ust// .callbacks[0] = ltt_serialize_data,
-//ust// };
-
int main()
{
int result;
printf("page size is %d\n", sysconf(_SC_PAGE_SIZE));
- char trace_name[] = "theusttrace";
- char trace_type[] = "ustrelay";
-
marker_control_init();
- marker_probe_register("abc", "testmark", "", probe, NULL);
- marker_probe_register("metadata", "core_marker_id", "channel %s name %s event_id %hu int #1u%zu long #1u%zu pointer #1u%zu size_t #1u%zu alignment #1u%u", probe, NULL);
+ //marker_probe_register("abc", "testmark", "", probe, NULL);
+//ust// marker_probe_register("metadata", "core_marker_id", "channel %s name %s event_id %hu int #1u%zu long #1u%zu pointer #1u%zu size_t #1u%zu alignment #1u%u", probe, NULL);
//ust// result = ltt_probe_register(&default_probe);
//ust// if(result)
//ust// ERR("ltt_probe_register");
- result = ltt_marker_connect("abc", "testmark2", "default");
- if(result)
- ERR("ltt_marker_connect");
+ //result = ltt_marker_connect("metadata", "testev", "default");
+ //if(result)
+ // ERR("ltt_marker_connect");
result = ltt_trace_setup(trace_name);
return 1;
}
-
+ start_consumer();
printf("Hello, World!\n");
+ sleep(1);
for(;;) {
- trace_mark(abc, testmark, "", MARK_NOARGS);
- trace_mark(abc, testmark2, "", MARK_NOARGS);
- sleep(1);
+ //trace_mark(abc, testmark, "", MARK_NOARGS);
+ //trace_mark(metadata, testev, "", MARK_NOARGS);
+ trace_mark(metadata, core_marker_id,
+ "channel %s name %s event_id %hu "
+ "int #1u%zu long #1u%zu pointer #1u%zu "
+ "size_t #1u%zu alignment #1u%u",
+ "abc", "def", (unsigned short)1000,
+ sizeof(int), sizeof(long), sizeof(void *),
+ sizeof(size_t), ltt_get_alignment());
+ usleep(100000);
}
scanf("%*s");
/* Out-of-order commit */
ltt_commit_slot(channel, &transport_data, buf_offset,
slot_size);
+ printf("just commited event at offset %d and size %d\n", buf_offset, slot_size);
}
//ust// __get_cpu_var(ltt_nesting)--;
ltt_nesting--;
all: libmarkers.so
libmarkers.so: marker.c *.c *.h
- gcc -g -fPIC -I../share -I../libtracing -shared -o libmarkers.so marker.c ../share/kref.c ../libtracing/channels.c
+ gcc -g -fPIC -I../share -I../libtracing -I. -shared -o libmarkers.so marker.c ../share/kref.c ../libtracing/channels.c
.PHONY: libmarkers.so all
#include "usterr.h"
#include "channels.h"
#include "tracercore.h"
+#include "tracer.h"
extern struct marker __start___markers[];
extern struct marker __stop___markers[];
//ust// }
//ust// }
-#ifdef CONFIG_MODULES
+//ust//#ifdef CONFIG_MODULES
/**
* marker_get_iter_range - Get a next marker iterator given a range.
goto end;
}
/* Markers in modules. */
- found = module_get_iter_markers(iter);
+//ust// found = module_get_iter_markers(iter);
end:
if (!found)
marker_iter_reset(iter);
return entry && !!entry->refcount;
}
-#endif
+//ust// #endif
int marker_module_notify(struct notifier_block *self,
unsigned long val, void *data)
#endif /* CONFIG_MODULES */
-//ust// void ltt_dump_marker_state(struct ltt_trace_struct *trace)
-//ust// {
-//ust// struct marker_iter iter;
-//ust// struct ltt_probe_private_data call_data;
-//ust// const char *channel;
-//ust//
-//ust// call_data.trace = trace;
-//ust// call_data.serializer = NULL;
-//ust//
-//ust// marker_iter_reset(&iter);
-//ust// marker_iter_start(&iter);
-//ust// for (; iter.marker != NULL; marker_iter_next(&iter)) {
-//ust// if (!_imv_read(iter.marker->state))
-//ust// continue;
-//ust// channel = ltt_channels_get_name_from_index(
-//ust// iter.marker->channel_id);
-//ust// __trace_mark(0, metadata, core_marker_id,
-//ust// &call_data,
-//ust// "channel %s name %s event_id %hu "
-//ust// "int #1u%zu long #1u%zu pointer #1u%zu "
-//ust// "size_t #1u%zu alignment #1u%u",
-//ust// channel,
-//ust// iter.marker->name,
-//ust// iter.marker->event_id,
-//ust// sizeof(int), sizeof(long),
-//ust// sizeof(void *), sizeof(size_t),
-//ust// ltt_get_alignment());
-//ust// if (iter.marker->format)
-//ust// __trace_mark(0, metadata,
-//ust// core_marker_format,
-//ust// &call_data,
-//ust// "channel %s name %s format %s",
-//ust// channel,
-//ust// iter.marker->name,
-//ust// iter.marker->format);
-//ust// }
-//ust// marker_iter_stop(&iter);
-//ust// }
+void ltt_dump_marker_state(struct ltt_trace_struct *trace)
+{
+ struct marker_iter iter;
+ struct ltt_probe_private_data call_data;
+ const char *channel;
+
+ call_data.trace = trace;
+ call_data.serializer = NULL;
+
+ marker_iter_reset(&iter);
+ marker_iter_start(&iter);
+ for (; iter.marker != NULL; marker_iter_next(&iter)) {
+ if (!_imv_read(iter.marker->state))
+ continue;
+ channel = ltt_channels_get_name_from_index(
+ iter.marker->channel_id);
+ __trace_mark(0, metadata, core_marker_id,
+ &call_data,
+ "channel %s name %s event_id %hu "
+ "int #1u%zu long #1u%zu pointer #1u%zu "
+ "size_t #1u%zu alignment #1u%u",
+ channel,
+ iter.marker->name,
+ iter.marker->event_id,
+ sizeof(int), sizeof(long),
+ sizeof(void *), sizeof(size_t),
+ ltt_get_alignment());
+ if (iter.marker->format)
+ __trace_mark(0, metadata,
+ core_marker_format,
+ &call_data,
+ "channel %s name %s format %s",
+ channel,
+ iter.marker->name,
+ iter.marker->format);
+ }
+ marker_iter_stop(&iter);
+}
//ust// EXPORT_SYMBOL_GPL(ltt_dump_marker_state);
ret = 0;
else if (strcmp(name, "core_marker_format") == 0)
ret = 1;
+ else if (strcmp(name, "testev") == 0)
+ ret = 2;
else
ret = -ENOENT;
goto end;
#define printk_dbg(fmt, args...)
#endif
-/* LTTng lockless logging buffer info */
-struct ltt_channel_buf_struct {
- /* First 32 bytes cache-hot cacheline */
- local_t offset; /* Current offset in the buffer */
- local_t *commit_count; /* Commit count per sub-buffer */
- atomic_long_t consumed; /*
- * Current offset in the buffer
- * standard atomic access (shared)
- */
- unsigned long last_tsc; /*
- * Last timestamp written in the buffer.
- */
- /* End of first 32 bytes cacheline */
- atomic_long_t active_readers; /*
- * Active readers count
- * standard atomic access (shared)
- */
- local_t events_lost;
- local_t corrupted_subbuffers;
- spinlock_t full_lock; /*
- * buffer full condition spinlock, only
- * for userspace tracing blocking mode
- * synchronization with reader.
- */
-//ust// wait_queue_head_t write_wait; /*
-//ust// * Wait queue for blocking user space
-//ust// * writers
-//ust// */
- atomic_t wakeup_readers; /* Boolean : wakeup readers waiting ? */
-} ____cacheline_aligned;
-
/*
* Last TSC comparison functions. Check if the current TSC overflows
* LTT_TSC_BITS bits from the last TSC read. Reads and writes last_tsc
//ust// return mask;
//ust// }
-static int ltt_do_get_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, long *pconsumed_old)
+int ltt_do_get_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, long *pconsumed_old)
{
struct ltt_channel_struct *ltt_channel = (struct ltt_channel_struct *)buf->chan->private_data;
long consumed_old, consumed_idx, commit_count, write_offset;
return 0;
}
-static int ltt_do_put_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, u32 uconsumed_old)
+int ltt_do_put_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, u32 uconsumed_old)
{
long consumed_new, consumed_old;
*/
extern const struct file_operations ltt_relay_file_operations;
+
+/* LTTng lockless logging buffer info */
+struct ltt_channel_buf_struct {
+ /* First 32 bytes cache-hot cacheline */
+ local_t offset; /* Current offset in the buffer */
+ local_t *commit_count; /* Commit count per sub-buffer */
+ atomic_long_t consumed; /*
+ * Current offset in the buffer
+ * standard atomic access (shared)
+ */
+ unsigned long last_tsc; /*
+ * Last timestamp written in the buffer.
+ */
+ /* End of first 32 bytes cacheline */
+ atomic_long_t active_readers; /*
+ * Active readers count
+ * standard atomic access (shared)
+ */
+ local_t events_lost;
+ local_t corrupted_subbuffers;
+ spinlock_t full_lock; /*
+ * buffer full condition spinlock, only
+ * for userspace tracing blocking mode
+ * synchronization with reader.
+ */
+//ust// wait_queue_head_t write_wait; /*
+//ust// * Wait queue for blocking user space
+//ust// * writers
+//ust// */
+ atomic_t wakeup_readers; /* Boolean : wakeup readers waiting ? */
+} ____cacheline_aligned;
+
+int ltt_do_get_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, long *pconsumed_old);
+
+int ltt_do_put_subbuf(struct rchan_buf *buf, struct ltt_channel_buf_struct *ltt_buf, u32 uconsumed_old);
+
+
#endif /* _LINUX_LTT_RELAY_H */
*
* Returns a pointer to the trace structure, NULL if not found.
*/
-static struct ltt_trace_struct *_ltt_trace_find(const char *trace_name)
+struct ltt_trace_struct *_ltt_trace_find(const char *trace_name)
{
struct ltt_trace_struct *trace;
* directly using this trace handle inside the logging function.
*/
-//ust// ltt_dump_marker_state(trace);
+ ltt_dump_marker_state(trace);
//ust// if (!try_module_get(ltt_statedump_owner)) {
//ust// err = -ENODEV;
#define LTT_FLIGHT_PREFIX "flight-"
/* Tracer properties */
-#define LTT_DEFAULT_SUBBUF_SIZE_LOW 65536
+//#define LTT_DEFAULT_SUBBUF_SIZE_LOW 65536
+#define LTT_DEFAULT_SUBBUF_SIZE_LOW 4096
#define LTT_DEFAULT_N_SUBBUFS_LOW 2
-#define LTT_DEFAULT_SUBBUF_SIZE_MED 262144
+//#define LTT_DEFAULT_SUBBUF_SIZE_MED 262144
+#define LTT_DEFAULT_SUBBUF_SIZE_MED 4096
#define LTT_DEFAULT_N_SUBBUFS_MED 2
-#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 1048576
+//#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 1048576
+#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 4096
#define LTT_DEFAULT_N_SUBBUFS_HIGH 2
#define LTT_TRACER_MAGIC_NUMBER 0x00D6B7ED
#define LTT_TRACER_VERSION_MAJOR 2
unsigned long prev;
switch (size) {
case 1:
- asm volatile("lock cmpxchgb %b1,%2"
+ asm volatile("lock; cmpxchgb %b1,%2"
: "=a"(prev)
: "q"(new), "m"(*__xg(ptr)), "0"(old)
: "memory");
return prev;
case 2:
- asm volatile("lock cmpxchgw %w1,%2"
+ asm volatile("lock; cmpxchgw %w1,%2"
: "=a"(prev)
: "r"(new), "m"(*__xg(ptr)), "0"(old)
: "memory");
return prev;
case 4:
- asm volatile("lock cmpxchgl %k1,%2"
+ asm volatile("lock; cmpxchgl %k1,%2"
: "=a"(prev)
: "r"(new), "m"(*__xg(ptr)), "0"(old)
: "memory");
return prev;
case 8:
- asm volatile("lock cmpxchgq %1,%2"
+ asm volatile("lock; cmpxchgq %1,%2"
: "=a"(prev)
: "r"(new), "m"(*__xg(ptr)), "0"(old)
: "memory");
projects / ust.git / commitdiff
